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(No Model.)

A. P. THAYER.

- DIE FOR MAKING METALLIC FENCE BARBS.

Patented Apr. 7, 1885.

INVENTOR= WITN EESES a. mans. W

UNITED STATES PATENT OFFICE.

ANSON I. THAYER, OF BROOKLYN, NEW YORK, ASSIGNOR- TO THOMAS WV. HALL, OF SAME PLACE.

DIE FOR MAKING METALLlCyFENCE-BARBS.

SPECIFICATION forming part of Letters Patent No. 315,086, dated April 7 1885.

Application filed March 2, 1885. (N model.) i

To aZZ whom it may concern.-

' Be it known that I, ANsoN I. THAYER, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Dies for Making Barbed Metallic Fencing, of which the following is a specification.

This invention relates to dies for separating a double blank strip and forming barbs on the rods produced therefrom, the said strip consisting of two parallel cores and a connectingweb, which strip is to be sheared apart along the web, and part of the web is to be cut away in waste pieces to form the barbs.

The method of operation consists of, first, punching out the waste portions of the web to be removed from between the barbs and form- 'ing diagonal cross-bars of the remaining porthe accompanying drawings, in which- Figure 1 is a cross-section of the blank strip to be separated and barbed. Fig. 2 is a plan view of the bed-die and horizontal section of punches for punching out the waste pieces, also a diagram of the horizontal form of shearing-dies for shearing the cross-webs or barbwebs apart, and also a plan of a portion of a blank strip being cut. Fig. 3 is a side elevation of the devices represented in Fig. 2. Fig. 4 is a plan of the bed-die and a portion of the strip, also a horizontal section of punches of a modified form for punching out the waste material from between the barbs and for partly separatingithejiblank strip. Fig. 5 is a side elevation of the punches, die, and blank strip represented in Fig. 4. Fig. 6 is a plan view of the bed-die and horizontal section of the movable die, to be used in connection with the punches of Figs. 4 and 5, for shearing apart the cross-webs and completing the barbs and the separation of the strip, with a portion of the strip between the dies, as when being separated by them; and Fig. 7 is a side elevation of the dies of Fig. 6 and the blank strip thereon.

First, I propose to punch out the waste material, as at a or a, so as to leave diagonal cross-webs d, to form the barbs 0, using ordinary punches, b, and dies 0, which may either have parallel diagonal edges 6, as in Figs. 2 and 3, or converse diagonal edges e, as in Figs. 4 and 5; and Ithen shear apart the diagonal cross-webs diagonally across them, as indicated by the dotted lines f,which completes the separation of the strips and also completes the barbs. For shearing the cross-webs apart I use a bed-die, g, and a corresponding mova= ble die, 2', having one or more diagonal cuttingedges, 71 when the punches and dies having parallel edges are used to punch out the waste; but when the punches and dies of Figs. 4 and 5 are used I employ a bed-die, g, and movable die 2", having two or more diagonal cuttingedges, h.

I11 the first arrangement of dies, having parallel diagonal edges 0, the cross-webs left between the waste portions punched out are inclined in the same direction, and are parallel, and one punch and die may be employed for punching out all the waste pieces in succession, also shearing-dies having only one pair of cut ting-edges, h,- but the punches and the shearing-cutters may be increased in number at will. But with the arrangement of punches having converse inclined edges 0', Fig. 4,two punches and dies, arranged conversely as to the edges 6, have to be used, which makes the crosswebs alternately converse to each other, and the shearing-dies g and 2" must have two converse cutters, h, to correspond with the con-. verse inclinations of the said cross webs. These punches and shearing-dies may be increased in number by twos as desired, and in both arrangements the punches and shearingdies may be arranged in one press,so that the strips to be out will be punched and separated at once; or the punches and dies of both arrangements may be mounted and worked separately.

WVith the punches and dies of Fig. 2 the barbs will all be formed the same distance apart; but with the arrangement. .of Fig. 4 the barbs will be different distances apart alternately. When only one punch and one pair of shearing-dies are used, the strips will be fed along the distance of one barb from another apart; but as the number of punches and dies is increased the length of the feed movements will be correspondingly increased.

The blank strip to be out and barbed consists of the two parallel cores j, connectingweb k, and the outer thin edges, Z.

The method of separating and barbing th separate strips herein described constitutes the subject-matter of a separate application for a patent, and is not claimed in this case.

What I claim, and desire to secure by Letters Patent, is-

1. The combination of punches and dies adapted to punch out holes at intervals along a blank strip and form diagonal cross-bars separating said holes, with shearing dies adapted to shear said cross-bars apart diagonally, and thereby form pointed barbs, substantially as described.

2. The combination of punching-dies b 0, 

